Post moem lividity persists till :

D i.e. Merges with putrefactive changes - Postmoem lividity also k/a suggilation, vabices, hypostasis, staining, darkening of death is an early sign of death & commences within an hour of death.Q - Fixed in about 4 - 6 hoursQ; reaches maximum between 6-12 hoursQ and persists until putrefaction sets in.Q Lividity does not develop in drowning in running water & areas of contact flattening.Q When lividity first develops (i.e. before fixing), on applying firm pressure it disappears & releasing pressure it reappears (Difference from bruise).